Sonic 3 and Knuckles. It had 3 playable characters with unique gameplay styles, they all could go into super mode (knuckles was PINK. LOL), and the special stages didn't suck. It truly was the best sonic game, no, the best platforming game, no, the VERY BEST GAME EVER. Sonic FTW. I almost went for sonic adventure, but it's bugs and technical issues (whenever I played, geez it was like the game was trolling me to the point of being sonic 06-like) plagued it (for ME???). Oh. and tails sounded like a seven year old. The song in "Speed Highway" was great too.